[racket] Problem Stream with alternating values

Patrick,

> I saw that. The requirement for a stream of alternating values was
> clearly stated, but then it confusingly talked about the internal
> structure of a stream.  Surely if the stream is constructed by
> stream primitives then it will all be thunked.  Or do you read the
> problem as requiring that the stream itself be separately thunked?

Is this from the archive on Coursera "Programming Languages" taught by
Dan Grossman? If Racket's built in streams were mentioned at all it
was to say something like, Racket has built in support for streams,
but for the purpose of this class we are going to implement our own
streams.

The videos "Using Streams" and "Defining Streams" in section 5 covers
how to use and implement streams. There is a summary in the section 5
reading notes. Racket stream primitives make no appearance.

-- Shannon

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